Fabricated pressing head



Feb. 21, 1945.

F. c. LORNITZOA 2,370,612

FABRICATED PRESSING HEAD Filed.Feb. 25, 1942 e Sheets-Sheet 1 I Inventor lG'r'arnkC-Lornit" o vqttorney;

Feb. 27, 1945. F. c. LORNITZO' 2,370,612

FABRICATED PRESSINQ HEAD v Filed Feb. 23, 1942 6 Sheets-Sheet 2 for LIL or121'f70 L/qtto Feb. 27, '1945. I F. c.-| oRNrrzo 2,370,612

FABRICATED PRESSiNG HEAD Filed Feb. 23, 1942 6 Sheets-Sheet 3 In vein to W158 Lornz'zyo fitter-neg Feb. 27, 1945. F. c. LORNITZO 2,370,612

' I FABRICATED'PRESSING Y Filed Feb. 25. 1942 6 Sheets-Sheet ,4

7 Inventor Frank C. Lorn1't7o 51 m. vqttoiitae y F. c. LoRmTzb ,37

FABRICATED PRESSING' HEAD Fild Feb. 23, 1942 6 Shets-Sheet 5 Pig @9 [av-en to! Hank CLornz'tgo B m v flttoi gy Feb; 27,1945 F. c. LORNITZO FABRICATED BRESSING HEAD Filed-Feb 25, 1942 6 sheets sheet 6 I Hank CLoiani 130 .B Y a Patented Feb. 21, 1945 FABRICATED PRESSING HEAD Frank 0. Lornitzo, Pawtucket, a. 1., assignor to Pantex Pressing Machine, Inc., Central Falls, R. L, a corporation of Delaware Application February 23, 1942, Serial No. 432,021

22 Claims.

- My invention relates to improvements inpressing heads. While my invention is particularly adapted for pressing heads forthe usual flat run of laundry work, in its broader principles it is applicable to a wide range of types of pressing 1 heads.

My invention comprises a'fabricated pressing head made up of a plurality of individually prefabricated parts suitably joined together in accordance with my invention. In order to attain suflicient strength in the pressing, heads, it has been customary in the prior art to'make single piece pressing heads of cast metal, which has resulted in extremely heavy pressing heads having thick pressingplates, and their manufacture has been subject to the usual difficulties of casting integral hollow unitary members, such as rethemselves external reinforcements for the steam chamber in the pressing head to suplementally hold the parts together, is to permit the use of lighter elements in the assembly, thus resulting in a finished pressing head comparable in weight to the pressing plate and still maintain a uniform amount of heat conductivity across the pressing plate.

In addition, employing the surface welding shown in various prior art patents it has been extremely diillcult to get at the parts to suitably weldthe desired parts together throughout their areas, resulting in unsatisfactory welding of the ar li further object of my-invention, due to the fact that the pressing plate is individually im- .tially manufactured, is to provide a pressing plate I -of flawless and, if desired, of non-corrosive construction. In making cast pressing heads,'the, pressing surface of'the pressing plate was often cast with air bubbles despite whatever care may have been taken in the casting, thus creating an imperfect pressing surface. Inasmuch as my improved pressing plate is initially made separately, it is'apparent that it may be of less metal, and suitably finished by electroplating or otherwise to provide a smooth flawless pressing surface.

Inasmuch as the pressing plate of my invention is thinner than the cast pressing plates hitherto made in the integral cast pressing heads, it is obvious that the rate of heat transfer through the pressing plate is correspondingly greater.

to a cast aluminum alloy pressing head, and the I use of light non-corrosive parts therefor constructed of stainless steel, Monel' metal, or other non-corrosive materials, or suitably plated with a non-corrosive metal plate of nickel, chromium, etc., or Parkerized or suitably otherwise flnished with anon-corrosive protective covering tov make up the assembly.

While I am aware that others have made pressing heads made up ofa plurality of parts secured together in various manners, such as by riveting, hardsoldering, or having parts surface or spot welded to each other, it is obvious that if a steam chamber be formed of compartments separated by partitions of substantial width across the face of the pressing plate, there will ..not be a uniform continuity of heat transmitted by the pressing surface of the pressing plate, and

a further object of my invention is to provide, apressing head having a steam chamber, preferably a multicbmpartment steam chamber, em-

ploying component parts which may be secured A further feature of my invention relates to the fact that I select and construct the parts of my invention so that they may be readily assembled by welding to provide the desired fusing of .the abutting surfaces and the external reinforcing fillets, in the manner hitherto described, the members being preferably selectively assembled ,successively on a foundation member, and each individual'member being welded to the foundation member prior to the addition of the other members.

A further featureof my invention relates to the simplicity of structure ofv the individual parts thereof, in the embodiments thereof specifically shown in this application comprising, in addition to the pressing plate means, one or more strong partially cylindrical members of substantially the length of the pressing plate welded thereto by external fillets in the manner hitherto described to make up the steam chamber. With this con-- =struction it is apparent that a strong steam chamber is provided, employing members making up one and/or a plurality of arches with the well known inherent strength of arch construction to make up a strong steam chamber'of relatively light parts, reinforced in the manner hitherto described by the externally welded fillets.

A further feature of my invention relates to 'the construction of the means I preferably em ploy for attaching the pressing head to the press ing lever.

V A further feature of an embodiment of my invention is that said partially cylindrical members may be made of such size and individually dis-'- novel construction which can be readily embodied in all standard types of pressing heads now on the market, such as laundry pressing heads, pant pressing heads, sleeve pressing heads, collarand cufl. pressing heads, etc.

A further object of my invention is to provide a pressing head meeting the requirements of insurance and municipal regulations.

These and such other objects of my invention as may hereinafter appear will be best understood, from a description of the accompanying drawings which illustrate various embodiments of my invention.

In the drawings,

Fig. 1 .is a diagrammatic perspective view of an embodiment of a pressing head suitable for laundry use, constructed in accordance with my invention, mounted in position on a laundry press.

Fig. 2 is a plan view of my improved pressing head shown in Fig. 1 with the insulating cove'r ing and outer shell removed.

Fig. 3 is a side edge elevation illustrating the parts of the pressing head shown in Fig. 2.

view similar to Fig. 14, illustrating how this feature of equal maximum stress is achieved for a five compartment steam chamber.

Fig. 1'1 is a diagrammatic transverse sectional view similar to Fig. 14, illustrating how this feature of equal maximum stress is achieved for a three compartment steam chamber.

Fig. 18 is a perspective'view of a modified form of a pressing head constructed in accordance with my invention having a single compartment pressing chamber constructed of a single generally partially cylindrical member suitable -for a sleeve press with the outer covering and outer shell removed.

Fig. 19 is a longitudinal sectional view taken along the line iS-l 9 of Fig. 18.

Fig. 20 is an end elevation of a portion of one end of the sleeve press shown in Figs. 18 and 19.

Fig. 21 is an enlarged diagrammatic transverse sectional view taken through a portion only of the pressing head to more accurately represent the external fillet welds.

In the drawings, wherein like characters of reference generally indicate like parts throughout,

'30 generally indicates a pressing head constructed in accordance with my invention, whether it comprise the oblong pressing head shown in GFigs. 1-7, the tapered pressing head 30', shown in Figs. 8-13, the specially constructed pressing head 30" having all portions of the pressing plate subjected to a substantially equal maximum stress, as shown in Figs. 14-17, whether it comprises the single compartment sleeve press 30" shown in Figs. 18-20, or whether it comprises other embodiments constructed in accordance Fig. 4 is a plan view of the pressing head shown in Figs. l-3 with theinsulating covering and outer shell attached;

Fig. 5.is a longitudinal sectional view taken alongthe line 5-5 of Fig.4.

Fig. 6 is a transverse sectional view taken along the line 8-6 of Fig. 4.

Fig. '7 is a transverse sectional view taken along the line T---1 of Fig. 4.

Fig. 8 is a plan view of a modified form of my invention comprising a tapered pressing head for use in pressing wearing apparel and other types of laundry work, constructed in accordance with my invention, with the insulating covering and outer shell removed. A

Fig. 9 is a side edge elevation illustrating the parts of the pressing head shown in Fig. 8.

Fig. 10 is a plan view of the tapered embodi ment of pressing head shown in Figs. 8 and 9 with the insulating covering and outer shell attached.

Fig. 11 is a longitudinal sectional view taken along the line Il--li of Fig. 10.

Fig. 12 is a transverse sectional view takenalong the line l2-l2 of Fig. 10.

Fig.. 13 is a transverse sectional view taken along the-line l3-l3 of Fig. 10.

Fig. 14 is a transverse sectional view taken along the line I4l4 of Fig. 19, or along any of the section lines l|'ll shown in Fig. 4' with the .partially cylindrical members thereof constructed and superimposed upon each other to provide a pressure chamber, with allportions of the pressing plate subjected to a substantially equal maximum stress for each compartment. e

Fig. 15 is a diagrammatic transverse sectional view similar-to Fig. 14, illustrating how this feature of equal maximum stress is achieved for a seven compariment steam chamber.

. Fig. 16 .is a diagrammatic transverse sectional gitudinal ly extending Afor said chamber.

" with the broad principles of my invention, such as the collar and end pressing head shown in my co-pending application for patent for Fabricated multi-purpose pressing head, S. N. 432,022, filed February 23, 1942.

As shown in Fig. l, the pressing head 30 is. suitably mounted on the end or the pressing lever 32 to pivot downwardly intopressing position over the pressing buck 34, the pressing head 30 being suitably moved to a pressing position, pressing the garments against the buck 34 by any suitable means, manually or poweractuated (not shown). I have shown inFig. 1 the aforementioned parts mounted on the usual frame 88 of standard type or laundry press 38.

In its broader aspects, my invention includes a pressing plate 40' and a steam or other heating fluid chamber 42 comprising a plurality oi'lonmembers of substantially the length of said pressing plate, having lower edges thereof abutting and externally welded to said pressingplate 40 by externally welded fillets and other edges abutting and externally welded to each other by externally welded fillets to provide longitudinally extending chamber means, preferably a plurality of separate'longitudinally extending chamber compartments, all said respective externally welded fillets substantially fusing the abutting surfaces together and providing supplemental external reinforcing fillets Each of the members are welded fron'i the outside as they/are-successively assembled to ether. I, therefore, employ the r 7 word external as referring to the individual moment of assembly of each respective individual unit, in other words to signify that the fillets are externally applied to each respective unitas it is successively assembled. Said pressing head may be provided with an inlet passage 44 and an outlet passage I, each connected to each indihitherto, namely that it fuses the abutting surfaces together and provides external reinforcing fillets, permits the use of separate members of relatively light weight to make up the pressing head assembly. The members making up the pressing head are also so selected and constructed that they may be successively assembled on a foundation member. In. all embodiments of my invention shown herein, said foundation member comprises the pressing plate 40. Thepressing plate 40 is constructed of thinner material'than hitherto possible in cast pressing heads and which may have its pressing surface suitably finished by electro-plating or otherwise to provide a smooth uniform preferably non-corrosive pressingsurface.

While the features of the broader aspects of my invention hitherto described apply to other embodiments, such as the embodiments shown in I my co-pending application aforesaid, my invention specifically relates to. the construction of the embodiments of myinvention shown in this application which permit the ready successive assembly of the various parts thereof on a foundation member, such as the pressing plate and the use of externally welded fillets, substantially fusing the abutting surfaces together and providing supplemental external reinforcing elements for the heating fluid chamber 42.

In the embodiments of my invention shown in this application, the; heating fluid chamber is formed by superimposing on the pressing plate 50 one or more longitudinally extending mem bers 50 of substantially the length of said pressing plate of generally partially cylindrical formation to provide, when attached, an arch construction, one of the strongest inherent structures known. Where it be desired to employ a single compartment heating fluid chamber 82", asin the embodiment of pressinghead 30"" shown in Figs. 18-20, I employ a single generally partially cylindrical member 00" for this purpose. In the other embodiments of my invention shown, it isdesirable to provide a multimediate partially cylindrical members w, w' or 00*" and pairs 00 of outer partially cylindrical members 80, 00 and 00", each partially cylindrical member thereof having an inner edge 00';

I0 or 00', or 00, 00 or 50" abutting and externally welded to a portion ofthe side wall 00, 00 or 00", or 00 00* or 00" of its respectively adjacent inner member 50, 50 or 00", or 00 00 or 00 by the respective external fillets 3 and I, and an outer edge 62, 02 or 02", or 02!,

02 and 02" abutting and externally welded to.

said pressing plate by the external fillets 2 and 0 respectively. Thus in the embodiment of my invention shown in Figs. 1-7, the center partially cylindrical member 50 is first placed in position over the center of the pressing plate to have the edges 52 thereof abut said pressing plate and suitably externally welded thereto by the external fillets l in the manner hitherto described. Each intermediate partially cylindrical" member I0 is then placed in position to have its inner,

edge 00 located in the proper position on the side wall 00 of the .center partially cylindrical member 50 and its outer edge 62 abutting the pressing plate and its respective Qiuter edge 82 is welded to said pressing plate by the external fillet 2 and its inner edge externally welded to the side wall 80 of the center partially cylindrical member 00 by the external fillet 3. Each outer partially cylindrical member 50 is then placed in.

position to have its inner edge 58 located in the proper position on the side wall 80 of its respectively adjacent inner member, in this instance the intermediate partially cylindrical member 50 and itsouter edge 82 abutting the pressing plate 80 and its respective outer edge 52 is weldcompartment heating fluid chamber 42, 42' or 42'. For this purpose in the other embodiments shown, I employ a plurality of longitudinally extending partially cylindrical members 00,

' or 50" of substantially the length of said' pressing plate. including a central partially cylindrical member 50, 50 or 50" overlying the center portion thereof and having each edge I! abutting the center portion of said pressing-plate 00, 40' or 40" and externally welded to said pressin plate by the external fillets' i.- For this pur-y and the outlet pipe hole 14 respectively aligned ed to said pressing plate by the external fillet 4, and its inner edge 58 is externally welded to the sidewall 60 of the next adjacent inner member, in this instance the intermediate member 50, by the external fillet 5. It is thus obvious that with this construction a heating fiuid chamber 82 is provided, comprising a center compartment 88, the intermediate compartments 00 and the outer compartments 64. If desired, however, the order of rotation of welding the fillets may be 1, 3, 2, 5 and 4. The intermediate partially cylindrical members 50 comprising the intermediate compartments 64 and including the center partially cylindrical member 50 forming the'center compartment 64. are provided with the aligned interconnecting passage holes 66 and 00 at each respective end' thereof and also with aligned holes at spaced intervals longitudinally thereof. In the embodiment shown, the intermediate transverse holes comprise the aligned in- .let holes 68 and88 and the aligned outlet holes 10* and 10. The rear outer partially cylindrical member 50 also has the respective similarly lone gitudinally spaced respective inlet pipe hole 12 with the aligned inlet holes 68 and 80 and aligned outlet holes 'I0 and. 10 hitherto described.

pose, as stated, I preferably externally fillet weld all of the external surfaces where each of the abutting edges 52 strikes the pressing plate 40. Inasmuch as the edges of these cylindrical members are relatively thin, they only abut the pressing plate through a relativelyshort width and do not substantially interfere with the heat distribution through the plate transversely across the pressing plate. I also employ pairs 00 of inter- The inlet pipe 40 extends through said inlet pipe hole 12 to the foremost outer partially cylindrical member 50" through the set of aligned inlet holes 68 and and has the discharge holes 45 on the upper surface thereofwithin each respective compartment 64. As stated, the outlet pipe hole 1 10 is aligned with said outlet holes I0 and 10.

To provide a heating fluid chamber ",whether it comprises a single chamber or a chamber having compartments, it is necessary to have its ends thereof suitably closed. For this purpose. in all embodiments shown I provide the vertical taching bosses 84 f by the outer attaching bosses members 50 by the external welded fillets I5.'

externally welded to the rear tie plate respective partially said pressing plate by the external fillets I. It is thus obvious that with this .construction I have provided a completely closed in heating fluid chamber 42 having the compartments. therein,

in the embodiments shown in Figs. 1-17.

For a purpose to be described, I provide an inlet boss I8 and an outlet boss 80, whlch embodiment shown are rectangular, projecting forwardly from said respective inlet hole I2 and outlet hole 14 in the rear partially cylindrical member 50, and preferably, in the embodiment shown, externally welded thereto by the external fillets 8. 1 also provide pressing lever attaching bosses, preferably central ones 82 over the central partially cylindrical member 50 and outer atcylindricai members 50 The center attaching boss abuts said center partially cylindrical member 50 and is welded thereto by the fillet 8. v The outer attaching bosses 84 abut the respective intermediate partially cylindrical members 50 and have their lower ends welded thereto by the fillets I0.

I also provide tie plates 88 each having a downwardly projecting front end 88 overlying and externally welded to said pressing plate 40 by the external fillets I4. inlet boss I8 and outlet boss 80 abut and are end 88 by the external fillets I8. Said outlet boss 80 is preferably aligned with the aligned set of outlet holes 10 and Ill in the partially cylindrical members 50 and 50. The tie plates 88 are provided with the cooperating attaching boss holes 80 for the center attaching boss 82 overlying the center member 50 and the outer attaching boss holes 82 for the outer attaching bosses 84 overlying the intermediate members 50. The respective pressing lever attaching bosses 82 and 84 are externally welded to their respective tie plate holes 80 and 82 by the respective fillets II and fillets I2. The ends 84 of the center portion 88 of the tie plates 88 overlying the center portions over the intermediate partially The outer edges of the.

in the screws I04,

inlet and outlet bosses I8 and 00, which in turn are externally welded to the pressing plate by the fillets 8, which may be continuations of the fillets 4. It is thusapparent that, as stated, all said respective externally welded fillets I--I5 substantially fuse the abutting surfaces together, which in each instance comprises the relatively thin edge of one member abutting the surface of anable material to cover the entire heating chamber 42 between the end plates Ii of substantially the transverse contour and secured to the tie plates 86 in any suitable manner, such as by the side flanges I01.

I have shown in Figs. 8-13 an embodiment of tapered pressing head 30' which may be used for certain types of laundry work. In this instance the pressing plate 40' tapers as at I05 towards one end thereof. In order that the heating fluid chamber 42' may correspondingly taper, each respective intermediate partially cylindricalmember and outer partially cylindrical members 50 has its respective inner edge 58" or 58 overlying the wall 60 or 80" of its respectively adjacent inner member 50 or '50" progressively increasing similar amounts from the wider and I08 thereof to the narrower end IIO thereof, progressively increasing in similar amounts to cause said overlying steam chamber to taper similarly to said pressing plate, with said respective compartments 64 and 64 progressively narrowing, from the section shown in Fig 12 to the section said steam chamber 42' .made up of said composite compartments to taper similarly to said pressing plate. other respects the embodiment. shown in Figs.

13-13 is exactly similar to the embodiment of my invention shown in Figs. 14.

of the outer partially cylindrical members 50 are provided with the holes 88. The ends '84 of the tie plate may be suitably welded to said overlying outer partially cylindrical members 50 by the external fillets I5 contained within said holes It is thus obvious that the-center portions 85 of the tie rods 88 form struts of substantially the contour of the pressing plates welded to the apex of each respective partially cylindrical member, to the center member 50 by the center attaching boss 82, to the intermediate members '50 84 and to the outer lindrical members and that said partially cylindrical members 'are supplementally secured to said pressing plate 40 by the respective ends of by the external fillets I4 88 of the tie plates 85 said ti'e'plates, namely binding the front ends to the pressing plate 40 and by-the fillets I8 binding the rear ends 88' of the tie plates 88 to the ing plate 42".

:center partially cylindrical member I have shown in Fig. 14 a cross-sectional view of the embodiment of my invention shown in Figs. 8 -13, taken along the line I4-I4 of Fig. 10, or along any transverse sectional line I4-I4 of the embodiment of my invention shown in Fig. 4, modified so as to provide a pressure chamber .42, having compartments'with all 'portions of the pressing plate 40" subjected to substantially equal maximum stress for each respective compartment. In order to achieve this result, however, it is necessary thatthe width of each intermediate compartment 84 including the center compartment 64", taken along the upper surface of the pressing plate be approximately 1.223 times the width of each, pressure compartment 64" taken along the upper surface of said press- In the embodiment shown, I have achieved this result by having the respective intermediate and outer partially cylindrical members 50 and 50" of greater radius than the 50". The ratio of relative width of -1.223 to 1 between the intermediate compartments, including the center compartment and the outer compartments taken along the upper surface plate may be proved as follows:

Assuming as shown in Figs. 15-17 that s represents the maximum allowable stress permissible for the material used for. the pressing plate for with the side walls thereof fitting within the channels I05. formed interior of the In all of the pressin the respective outer compartments and the intermediate compartments, W1 and We represent the evenly distributed load on the pressing plate for each respective compartment of one unit length; Li and La represent the respective transverse widths of the compartments taken along. the upper surface of the pressing plate; Z equals tandard engineering knowledge, the stress of each outer compartment may be expressed as follows:

\ The stress on each intermediate compartment,

as illustrated in. Case 18 on page 382 of said Handbook, may-be expressed as follows:

As pressure P is equal in all compartments, then W1=L1Pi for unit width W2=LzPz' for unit width and a S gwia wln A 122 Tn 3-2 2 L33 8 2 L Li=IaX 1.223

As illustrated in Figs. 15-17 any suitable number of intermediate compartments may be employed, such as seven shown in Fig. 15, five shown a have shown in Figs. iii-20 a single compartment pressing head constructed in accordance with my invention, having a pressing plate 40" of relative'ly small radiusincreasing from end to end so that it may similarly taper, which may be readily employed as a sleeve press for garments being laundered." In this instance the inlet and outlet pipes M and 48 and all pressing lever attaching bosses 82'! are'directly welded to the single partially cylindrical member 50" forming the single compartment 64", which in turn is welded to the pressing plate as usual by the fillets I, the end plates 'IQ'," being welded to the pressing plate and to the ends .of the partially cylindrical member ll"' by the fillets I and I .hltherto described; and the respective-inlet and outlet bosses|l'" and '1' and pressing lever attaching bosses It being welded to the partially cylindrical member n w; I: desired, the

partially cylindrical member 50" may be provided with suitable holes lit for the pressing lever attaching bosses 82', the lower ends of 5 which may project downwardly to abut the pressing plate 40', and if this is done, said lower ends may be welded to the pressing plate by the external fillets l5, and inasmuch as said attaching bosses are also welded to the cylindrical member 10 50 by the fillets II, it is obvious that said pressing lever attaching bosses 82""wi1l supplementally function as struts to positively bind the partially cylindrical member 50. externally to the center portion of the pressing plate 40',

thereby tending to prevent warping. in the arouately curved pressing plate. I

In any embodiment shown the pressing plate may be flat or arcuately curved, as illustrated, even to the shape, having a small radius, as

showninFigs. 18-20.

While any suitable type of welding may be employed with suflicient heat to cause the abutting surfaces to at least partially fuse together and to provide the external reinforcing fillets 5 l-ll hitherto described, I preferably employ are welding for this purpose. I have shown in Fig. 21 an enlarged view illustrating in detail how this fillet welding functions to partially melt portions of the abutting surfaces to cause them to fuse together, as at 2, and also provides the external reinforcing fillet lines ill to function as supplemental bolstering elements to preventexpansion and explosion of the heating steam chamber.

It is apparent that-I have provided a novel type of pressing head with. the advantages explained above.

It is understood that my invention is not limited to the specific embodiments shown and that variousdeviations may be made therefrom without departing from the spirit and scope of the appended claims.

What I claim is: i 1. A pressing head comprising a generally oblong pressing plate movable into pressing-relationship with a stationary buck and a heating fluid chamber superimposed thereon, comprising a plurality of'longitudinally extending rigid re- 1 inforcing members of substantially the length of saidpressing plate, having lowerjedges thereof abutting and externally welded to said pressing plate assembled together and other edges abutting and externally welded to other member por-= tions to provide longitudinally extending separate chamber compartments, intermediate ones of said members having aligned passage holes interconnecting said chamber compartments ,at spaced intervals transversely thereof, the rear member also having longitudinally spaced inlet 0 and outlet line holes in the rear edge thereof, an inlet line extending through said inlet line hole to theforemost chamber unit through' one set of transverseholes, the rear edge of said rear member also having an outlet line connected to -.65 said outlet line hole in line with another set of aligned transverse holes, all said respective externally welded fillets substantially fusing the abutting surfaces together and providing supplemental external reinforcing fillets for said chamber and means closing theends of said compartments. V

- 2.-A. pressing head comprising a generally oblong pressing plate movable into pressing relationship with a stationary buck and a heating fluid chamber superimposed thereon, comprising Q a plurality of longitudinally extending rigid reinforcing members of substantially the length of said pressing plate having lower edges thereof abutting and externally welded tosaid pressing plate assembled together and other edges abutting and externally welded to other member portions to provide longitudinally-extending separate chamber compartments, all said respective externally welded fillets substantially fusing the abutting surfaces together and providing supplemental external reinforcing fillets for said chamher and means closing the ends of said compartments.

3. A pressing head comprising a generally ob-" long pressing plate movable into pressing relationship with a stationary buck and a steam chamber superimposed thereon, comprising a plurality of longitudinally extending rigid reinforcing.members of substantially the length of said pressing plate having lower edges thereof abutting and externally welded to said pressing plate assembled together and other edges abutting and externally welded to other member portions, all said respective externally welded fillets substantially fusing the abutting surfaces together and providing supplemental external reinforcing fillets for said chamber and means closing the ends of the chamber.

4. A pressing head comprising an oblong pressing plate movable into pressing relationship with ternal reinforcing fillets for said chamber.

5. A pressing head comprising a generally oblong pressing plate movable into pressing relationship with a stationary buck and a heating fluid chamber superimposed thereon, comprising longitudinally extending rigid reinforcingmeans substantially circular in section throughout at least the major portion thereof of substantially the length of said pressing plate having each edge thereof abutting and externally welded to said pressing plate, vertical end plates for closing the ends of said means having inner walls abutting and externally welded to the ends thereof and the lower edges thereof abutting and externally welded to said pressing plat e, al1 said respective externally welded fillets substantially fusing the abutting providing supplemental external reinforcing fillets for said chamber, a fluid inlet passage connected to said means and a fluid outlet passage connected to said means.

8. A pressin tionship with a stationary buck and a heating "fluid chamber superimposed thereon, comprising longitudinalh' extendingrigid reinforcing means substantially least the major portion the lengthcf said pressing plate having each edge thereof abutting and externally. welded to said pressing plate,

welded fillets substantially fusing the abutting edges together and providing supplemental ex-' ternal reinforcing fillets for said chamber and means closing the ends of said means.

'7. A pressing head' comprising a generally oblong pressing plate movable into pressing relationship with a stationary buck-and a heating fluid chamber superimposed thereon, comprising a plurality of longitudinally extending partially cylindrical rigid reinforcing members of substantially the length of said pressing plate including a central partially cylindrical member overlying the center portion thereof and having each edge thereof abutting and externally welded to' said pressing plateand pairs of partially cylindrical members each having an inner edge abutting and externally welded to a portion of the side wall of its respectively adjacent inner member and an outer edge abutting and externally welded to said pressing plate, intermediate partially cylindrical members having aligned interconnecting passage holes at each end and at spaced intervals longitudinally thereof, the rear partially cylindrical member also having longitudinally spaced inlet and outlet line holes in the rear edge thereof, an.

inlet line extending through said inlet line hole to the foremost partially cylindrical member through one set of'transverse holes, vertical end plates for closing the ends of said partially cylindrical members having inner walls abutting and externally welded to the ends thereof and the edges together and head comprising a generally oblong pressing plate movable into pressing relapressing plate,

circular in section throughout at i thereof of substantially said respective emf-mu; 5

lower edges thereof abutting and externally weldied to said pressing plate, tie plates transversely overlying said partially cylindrical members having the front ends thereof overlying and externally welded to said pressing plate having at- I taching boss receiving holes therein, inlet and outlet bosses for said inlet and outlet lines projecting forwardly from and externally welded to said line holes in the rear partially cylindrical member and abutting and externally weldedto the rear tie plate end, said outlet boss being aligned with another set of transverse holes, and

pressing lever attaching bosses projecting through and externally welded to their respective tie plate holes having their lower ends abutting and externally welded to the portions of said partially cylindrical members underneath said holes to positively bind said tie plates to said chamber, all said respective externally welded fillets substantially fusing the abutting surfaces together and I providing supplemental external reinforcing illlets for said chamber. v 8. A pressing head comprising a g oblong pressing plate movable into pressing relationship with a stationary buckand a heating fluid chamber. superimposed thereon, comprising a plurality of longitudinally extending partially cylindrical rigid reinforcing members of substantiallythe length of said pressing plate including a central partially cylindrical member overlying the center portion thereof and having each edge thereof abutting and externally welded to said pressing plate andpairs of partially cylindrical members each having an inner edge abutting and externally welded to a portion of the side wall of its respectively adjacent inner member and an outer edge abutting and externally welded to said and vertical end plates for closing the ends of said pal-tially cylindrical members having inner walls abutting and externally welded to the ends, thereof and the lower edges thereof abutting and externally welded to said press-- in: plate, all said respectiverexternally welded fillets substantially fusing the abutting surfaces together and providing supplemental external reinfol-cing fillets for said chamber.

9. A pressing head comprising a generally oblong pressing plate movable into pressing relationship with a stationary buck and a heating fluid chamber superimposed thereon, comprising a plurality of longitudinally extending partially cylindrical rigid reinforcing members of substantially the length of said pressing plate including a central partially cylindrical member overlying the center portion thereof and having each edge thereof abutting and externally welded to said pressing plate and pairs of partially cylindrical members each having an inner edge abutting and externally welded to a portion of the side wall of its respectively adjacent inner member and an outer edge abutting and externally welded to said pressing plate, vertical end plates for closing the ends of said partially cylindrical members having inner walls abutting and externally welded to the ends thereof and the lower edges thereof abutting and externally welded to said pressing plate, tie plates transversely overlying said partially cylindrical members having the ends thereof overlying and externally welded to said pressing plate having attaching boss receiving holes therein, pressing lever attaching bosses projecting through and externally welded to their respective tie plate holes having their lower ends abutting and externally welded to the portions of said partially cylindrical members underneath said holes to positively bind said tie plates to said chamber, all said respective externally welded fillets substantially fusing the abutting surfaces together and providing supplemental external reinforcing fillets for said chamber.

10. A pressing head comprising a generally oblong pressing plate movable into pressing relationship with a stationary buck and a heating fluid chamber superimposed thereon, comprising a plurality of longitudinally extending partially cylindrical rigid reinforcing members of substantially the length of said pressing plate including a central partially cylindrical member overlying the center portion thereof and having each edge thereof abutting and externally welded to said pressing plate and pairs of par tially cylindrical members each having an inner respective externally welded fillets substantially fusing the abutting surfaces/together and providing supplemental external reinforcing .flllets for said chamber.

11. A pressing head comprising an oblong pressing plate movable into pressing relationship with a stationary buck and a heating fluid chamber superimposed thereon, comprising a plurality of longitudinally extending partially cylindrical rigid reinforcing members of substantially the length of said pressing plate including a central partially cylindrical member overlying the center portion thereof and having each edge thereof abutting and externally welded to said pressing plate and pairs of partially cylindrical members each having an inner edge abutting and externally welded to a portion of the side wall of its respectively adjacent inner member and an outer edge abutting and externally welded to said pressing plate, vertical end plates for closing the ends of said partially cylindrical members having inner walls abutting and externally welded to the ends thereof and the lower edges thereof abutting and externally welded to said pressing plate, all said respective externally welded 'flllets substantially fusing the abutting surfaces together and providing supplemental external reinforcing fillets for said chamber, a fluid inlet passage connected to each partially cylindrical member and a fluid outlet passage connected to each partially cylindrical member.

12. A pressing head comprising a tapered generally oblong pressing plate movable into pressing relationship with a stationary buck and a heat ing fluid chamber. superimposed thereon, comprising a plurality of longitudinally extending partially cylindrical rigid reinforcing members of substantially the length of said pressing plate including a'central partially cylindrical member overlying the center portion thereof and having edge abutting and externally welded to a portion of the side wall of its respectively adjacent inner member and an outer edge abutting and externally welded to said pressing plate, said par- "tially cylindrical members having aligned interconnecting passage holes at each end and at spaced intervals transversely thereof, the rear partially cylindrical member also having longitudinally spaced inlet and outlet pipe holes in the rear edge thereof, an. inlet pipe extending through said inlet pipe hole to the foremost partially cylindrical member through one set of transverse holes, the rear edge of said rear partially cylindrical member also having an outlet pipe connected thereto in line with another. set of aligned transverse holes, vertical end plates for closing the ends of said partially cylindrical members having inner walls abutting and externally welded to the ends thereof and the lower edges thereof abutting and exifemally welded; to said pressing plate, tie plates transverselyoverlying said partially cylindrical members having the ends thereof overlying and exeach edge thereof abutting and externally welded to said pressing plate and pairs of outer partially cylindrical members each having an inner edge abutting and externally welded to a portion of the side wall of its respectively adjacent inner member and an outer edge abutting and externally welded to said pressing plate, all said respective externally welded fillets substantially fusing the abutting surfaces together and providing supplemental external reinforcing fillets for said chamber, each respective outer partially cylindrical member of each pair having its respective inner edge overlying the wall of its respectively adjacent inner member progressively increasing similar amounts to cause heating fluid chamber superimposed thereon,

comprising a plurality of longitudinally extending partially cylindrical rigid reinforcing members of substantially the length of said pressing plate including a central partially cylindrical ternally welded to said pressing plate, all said member overlying the center portion thereof and having each edge thereof abutting and externally welded to said pressing plate and pairs of outer partially cylindrical members each having an inner edge abutting and externally welded to a portion of the side wall of its respectively adjacent inner member and an outer edge abutting and externally welded to said pressing plate, verjected to a substantially tie plates tical end plates for closing the ends of said partially cylindrical members having inner walls abutting and externally welded to the ends thereof and the lower edges thereof abutting and externally welded to said pressing plate, all said respective externally welded fillets substantially fusing the abutting surfaces together and providing supplemental external reinforcing fillets for said chamber, each respective outer partially cylindrical member of each pair having its respective inner edge overlying the wall of its respectively adjacent inner member progressively increasing similar amounts to cause said overlying heating fluid chamber to taper similarly to said pressing plate.

14. A pressing head comprising a generally oblong pressing plate movable into pressing relationship with a stationary buck and a heating fluid chamber superimposed thereon, comprising a plurality of longitudinally extending partially cylindrical rigid reinforcing .members of substantially the length of said pressing plate including a central partially cylindrical memberoverlying the center portion thereof forming a central heating fluid chamber compartment and having each edge thereof abutting and externally welded to said pressing plate and pairs of partially cylindrical members of greater radius than said central partially cylindrical member, each' having an inner edge abutting and externally welded to a portion of the side wall of its respectively adjacent inner member and an outer tour oi edge abutting and externally welded to said pressing plate to provide outer pressure chamber compartments and intermediate pressure chamber compartme 'ts, said members being superimposed on each other so that the width of each intermediate compartment including said center compartment taken along the upper surface of the pressing plate is approximately 1.223 times the width of each outer pressure vchamber compartment taken along the upper surface of said pressing plate so as to provide a pressure chamber with allportions of the pressing plate subfor each compartment, intermediate partially cylindrical members having aligned interconnecting passage holes at each end and at spaced intervals longitudinally thereof, the rear partially cylindrical member also having longitudinally spaced inlet and outlet line holes in the equal maximum stress said tie plates to said chamber, all said respective externally welded fillets substantially fusing the abutting surfaces together and providing supplemental external reinforcing fillets for said chamber, and an insulating inner covering and an outer shell substantially the transverse conand secured to said tie plates between said end plates having. holes therein for said line and attaching bosses.

15. A pressing head comprising a generally oblong pressing plate movable into pressing relationship with-a stationary buck and a heating fluid chamber superimposed thereon comprising a plurality of longitudinally extending partially cylindrlcal rigid reinforcing members of substantially the length of said pressing plate, including a I central-partially cylindrical member overlying a center portion thereof forming a central heating fluid chamber compartment and having each edge thereof abutting and externally'welded to said pressing plate and pairs of partially cylindrical members of greater radius than said central partially cylindrical member, each having an inner edge abutting and externally welded to a portion of the side wall of its respectively adjacent inner member, and an outer edge abutting and ex-.

ternally welded to said pressing plate to provide outer pressure chamber compartments and intermediate pressure chamber compartments, said members being superimposed on each other so that the width of each intermediate compartment including said center compartment taken along the upper surface'of" the pressing plate is approximately 1.223 times the width of each outer pressure chamber compartment taken along the upper surface of said pressing plate so as to provide a pressure chamber with all portions of the pressing plate subjected to a substantially equal maximum stress for each comrear edge thereof, an inlet line extending through said inlet line hole to the foremost partially cy-' lindrical member through one set of transverse holes, vertical end plates for closing the ends of said partially cylindrical members having inner walls abutting and externally welded to the ends thereof and the lower edges thereof abutting and externally welded to said' pressing plate,

transversely overlying said partially cylindrical members having the front ends thereof overlying and externally welded to said 1 pressing plate having attaching boss receiving holes therein, inlet and outlet bosses for said inlet and. outlet lines projecting forwardly from and externally welded to said line holes in the and externally welded to the rear tie plate end, said outlet boss being aligned with another set of transverse holes, pressing lever attaching proiectingthrough and externally welded to their respective tie plate holes having their lower ends abutting and externally welded to the-portions of said partially to said pressing plate and pairs-of partially cylindrical members, each having aninner edge abutting and externally welded to a portion of the side wall of its respectively adjacent inner member, and an outer edge abutting and extern'ally welded to said pressing plate to provide outer pressure chamber compartments and intermediate pressure chamber compartments and rear partially cylindrical member and abutting means closing the ends of said compartments, said members being superimposed on each other so as to provide a pressure chamber with all portions of the pressing plate subjected to a substantially equal maximum stress for each compartment, all said respective externally welded fillets substantially fusing the abutting surfaces together and providing supplemental external reinforcing fillets for said chamber.

, v cylindrical mem-' v H bers underneath said holes to positively, bind 17. A pressing head comprising a generally oblong pressing plate movable into pressing relationship with a stationary\buclr and a hcatins iluid chamber superimposed thereon comprising a plurality of longitudinally extending partially cylindrical rigid reinforcing members of substantially the length of said pressing plate, including a central partially cylindrical member overlying a center portion thereof forming a central heat- .ing fluid chamber compartment and having each edge thereof abutting and externally welded to said pressing plate and pairs of partially cylindrical members of greater radius than said central pa ially cylindrical member, each having an inner dge abutting and externally welded to a portion of the side wall of its respectively adjaa cent inner member, and an outer edge abutting and externally welded to said' pressing plate to' provide outer pressure chamber compartments and intermediate pressure chamber compartments and means closing the "ends of said compartments, said members being superimposed on each other so as to provide a pressure chamber with all portions of the pressing plate subjected to a substantially equal maximum stress for each compartment, all said respective externally welded fillets substantially fusing the abutting surfaces together and providing supplemental external reinforcing fillets for said chamber.

18. A" pressing head comprising a generally oblong pressing plate movable into pressing relationship with astationary buck and a heating fluid chamber superimposed thereoncomprising -a plurality of longitudinally extending partially cylindrical rigid reinforcing members of substantially the length of said pressing plate, includin a central partially cylindrical member overlyi a center portion thereof forming a central heating fluid chamber compartment and having each edge thereof abutting and externally welded to said pressing plate and pairs of partially cylindrical-members, each having an inner edge abut ting and externally welded to a portion of the side wall of its respectively adjacent inner memher, and an outer edge abutting and externally welded to said pressing plate to provide oute'r pressure chamber compartments and intermediate pressure chamber compartments, said members being superimposed on each other so that the width of each intermediate compartment in cluding said center compartment taken along the upper surface of the pressing plate is approximately 1.223 times the width of each outer pressure chamber compartment taken along the upper surface of said pressing plate so as to provide a pressure chamber withv all portions ofthe 9 nally welded to said pressing plate, and vertical end plates for closing the ends of said member having inner walls abutting and externally weldedto the ends thereof and the lower edges thereof abuttingand externally welded to said pressing plate, all said respective externally welded flllets substantially fusing the abutting edges together and providing'supplemental external reinforcing flllets for said chamber.

20. A pressing head comprising a generally oblong pressing plate movable into pressing relationship with a stationary buck and a heating fluid chamber superimposed thereon, comprising a single longitudinally extending rigid reinforcing member substantially circular in section throughout at least the major portion thereof of substantially the length of said pressing plate having each edge thereof abutting and externally welded to said pressing plate, all said respective externally welded flllets substantially fusing the abutting edges together and providing supplemental external reinforcing fillets for said cham her and means to close the ends of said member.

21.-A pressing head comprising a generally oblong pressing plate movable into pressing relationship with a stationary buck and a heating a fluid chamber superimposed thereon, comprising pressing plate subjected to a substantially equal v stress for each compartment, all said respective externally welded fillets substantially fusing the abutting surfaces together and providing supplemental external reinforc fillets forsaid chamber and means closing th ends of said compartments. a

7 19. A pressing head comprising a generally I oblong pressing plate movable into pressing relationship with a stationary buck and a heating fluid chamber superimposed thereon, comprising a single longitudinally extending rigid reinforc ing member -substantially circular in section throughout at least the major portion thereof" ofsubstantially the length ofsaid pressing plate a single longitudinally extending rigid reinforcing member substantially circular in section throughoutat least the major portion thereof of substan-:

tially the length of said pressing plate having each edge thereof abutting and externally welded to said pressing plate, vertical end plates for closing, the ends of said member having inner walls abutting and externally welded to the ends thereof and'the' lower edges thereof abutting and externally welded to said pressing plate, all said respective externally welded flllets substantially fusing the abutting edges together and providing supplemental external reinforcing fillets for said chamber, a mild inlet passage connected to said member. and a fluid outlet passage connected to said member.

22. A, pressing head comprising a generally oblong pressing plate movable into pressing reexternally" welded to the ends thereof and the lower edges thereof abutting and externally I welded to said pressingplate, pressing lever attheir lower ends abuttingand externally welded to the portions of said pressing plate underneath said holes to positively bind said chamber-to said having each "edge thereof abutting and extertaching bosses projecting through and externally welded'to their respective-member holes having pressing plate, all said respective externally welded flllets substantially fusing the abutting edges together and providing supplemental external said chamber.

reinforcing fillets for 

